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Lava tube in the highlands of Santa Cruz Island in Galapagos National Park, Ecuador. Santa Cruz is the second largest island in Galapagos.
One of many lava tunnels that are allowed for turists in Santa C in Santa Cruz, Islas Galápagos, Ecuador
Deep underground inside an abandoned mine shaft.
Old Lava cave in Iceland open for tourists
Hawaii Volcanoes National Park
Volcano dark cave in southern Vietnam
A relatively new flow of lava covers this island as there is no vegetation present at all, though the cracks have begun to show
Galapagos Islands - July 22, 2017: Lava tunnels of Santa Cruz Island
Walking through tunnel
Lava tunnels on the island of Santa Cruz in the Galapagos Archipelago, Ecuador
Iceland travel: Close-up of  Lava rock  from dorment Volcano Lava field near Fagradalsfjall Volcano
Thurston Lava Tube at Hawaii Volcanoes National Park
A person stands in a volcanic cave, capturing a moment of exploration. The cave features rugged rock formations and a brilliant light source illuminating the interior. The individual is dressed in outdoor gear, highlighting the adventurous spirit of the expedition.
A man walking and exploring the cave
Man Standing Below Sunlight Streaming In Cave
Galapagos Islands - August 26, 2017: Landscape of the Lava tunnels of Isabela Island, Galapagos Islands, Ecuador
Lanzarote, Spain: lava tube with climbing tops
Volcano dark cave in southern Vietnam
Lava Tunnel at Puerto Villamil on Isabela island of Galapagos islands, Ecuador, South America
Lava tunnels on the island of Santa Cruz in the Galapagos Archipelago, Ecuador
Nahuku - Thurston Lava Tube near exit. Plant roots hang down from ceiling. A walk trough the lava tube is one of the main attractions at Hawaii Volcanoes National Park, Hawaii.
Speleologo sulla grotta del Pero in Umbria
Lava coast.
Azdavay Medil Cave stalactites and stalagmites - Küre Mountains National Park
This special place was created when a volcano erupts in Big Island, Hawaii
Thurston lava tube, Pahoa -Kea'au, Hawaii
Narusawa Ice Cave in the national park Fuji in Japan
Shot of volcanic rock formations surrouding water and coral reef. Taken in Kauai, Hawaii, during the day.
Natural Stone Arch in El Hierro Canary Islands
Illuminated pathway winding through a volcanic cave, revealing the geological wonders formed by ancient lava flows
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